Volume 78, Number 1, April 2007
Article Number 16001
Number of page(s) 4
Section Condensed Matter: Structural, Mechanical and Thermal Properties
Published online 12 March 2007
EPL, 78 (2007) 16001
DOI: 10.1209/0295-5075/78/16001

Determining radial breathing mode frequencies of single-walled carbon nanotubes with an atomic force microscope

J. Fraxedas1, G. Rius2, F. Pérez-Murano2 and A. Verdaguer3

1  Institut de Ciència de Materials de Barcelona (ICMAB-CSIC) - Campus de la UAB, E-08193 Bellaterra, Spain
2  Institut de Microelectrònica de Barcelona (IMB-CNM-CSIC) - Campus de la UAB, E-08193 Bellaterra, Spain
3  Institut Català de Nanotecnologia (ICN) - Campus de la UAB, E-08193 Bellaterra, Spain

received 11 January 2007; accepted in final form 12 February 2007; published April 2007
published online 12 March 2007

We report on the experimental determination of the radial breathing mode frequency ($\simeq 5$ THz) of individual single-walled carbon nanotubes by nanoindentation measurements performed with an Atomic Force Microscope using commercial microfabricated silicon cantilevers with ultrasharp tips, evidencing the sensitivity of such instruments to frequencies in the THz range, well above the resonance frequencies of the cantilevers ($\sim 130$ kHz).

63.22.+m - Phonons or vibrational states in low-dimensional structures and nanoscale materials.
61.46.Fg - Nanotubes.
68.37.Ps - Atomic force microscopy (AFM).

© Europhysics Letters Association 2007